Table 5

Concordance between clinical axSpA diagnosis and any positive imaging (MRI-SI and/or X-SI) for all patients and stratified for total number of SpA features

 Clinical axSpA diagnosis
YesNoTotal
All patients
Any positive imaging
 Yes14710157
 No103240343
 Total250250500
 OR (95% CI)34.3 (17.3 to 67.7)
1 feature
Any positive imaging
 Yes29837
 No9113122
 Total38121159
 OR (95% CI)45.5 (16.1 to 128.3)
2 features
Any positive imaging
 Yes36238
 No2679105
 Total6281143
 OR (95% CI)54.7 (12.3 to 243)
3 features
Any positive imaging
 Yes300*30
 No193049
 Total493079
 OR (95% CI)95.4 (5.5 to 1652.2)
4 features
Any positive imaging
 Yes520*52
 No491867
 Total10118119
 OR (95% CI)39.2 (2.3 to 668.8)
  • *For computation of ORs in case of zeroes, 0.5 were added to all cells.

  • axSpA, axial spondyloarthritis; MRI-SI, MRI of sacroiliac joints; X-SI, radiograph of sacroiliac joints; SpA, spondyloarthritis.